Q. If the rate of a reaction quadruples when the concentration of a reactant is doubled, the order of reaction with respect to that reactant is:

यदि किसी अभिकारक की सांद्रता दोगुनी होने पर प्रतिक्रिया की दर चौगुनी हो जाती है, तो उस अभिकारक के संबंध में प्रतिक्रिया का क्रम है:

Zero
शून्य

Rate ∝ [A]^n
Given: doubling [A] → rate × 4

2^n = 4 \Rightarrow n = 2

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